
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
  }

  .container {
    width: 300px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-top: 100px;
  }

  h2 {
    text-align: center;
    color: #333;
  }

  input[type="text"], input[type="password"],input[type="captcha"],input[type="email"] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    box-sizing: border-box;
  }

  button {
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    width: 100%;
  }
  .submit:hover {
    opacity: 0.8;
  }
  .user{
    width: 100%;
    height: 100%;
    margin: 0 auto;
    padding: 0 auto;
  }
  .header{
    width: 100%;
    height: 50px;
    background-color: aqua;
  }
  .avatar{
    width: 40px;
    height: 40px;
    float: right;
    background-color: white;
    border-radius: 20px;
    margin: 5px;
  }
  .list-container{
    background-color: aquamarine;
    width: 150px;
    height: 100%;
    margin: 0 auto;
    padding:0 auto;
    float: right;
  }
  .list-container li{
    list-style: none;
    margin: 20px 20px ;
    float: right;
  }
  .list-container a{
    text-decoration: none;
    color: black;
  }
  .list-container a:hover{
    color: red;
  }